Stator, electric machine and vehicle

Abstract

The utility model discloses a kind of stator, motor and vehicle, it is related to motor technical field, stator includes stator core and multiple winding structures, flat wire structure has two connecting ends, at least one connecting end has the end face of the core wire bare insulation layer of making flat wire structure, and at least one bare side, at least one bare side includes bonding surface, bonding surface is used to with the bonding surface of the core wire of another flat wire structure and fits welding, bonding surface is set as inclined plane. Bonding surface is at the side of core wire, compared with the end face size of core wire can be set larger, since bonding surface is set as inclined, when two flat wire structures are welded, two bonding surfaces have larger contact area mutually than existing plane fitting structure, to enhance welding connection force, so that the conduction ability after welding is improved, to improve the problem of existing wire welding after welding connection quality poor.

Description

Technical Field

[0001] This utility model relates to the field of motor technology, and in particular to stators, motors and vehicles. Background Technology

[0002] Flat wire structures are often used in electromagnetic drive technology. Taking new energy motors as an example, based on the requirements for power density, torque density and cost of the product, there are requirements for the winding form and the power connection form. However, there is still a problem of unstable connection after winding and welding. Utility Model Content

[0003] The main purpose of this invention is to propose a stator, motor, and vehicle that increases the contact area during welding of flat wire structures, thereby enhancing the connection effect and conductivity.

[0004] To achieve the above objectives, this utility model proposes a stator, comprising:

[0005] Stator core; and,

[0006] Multiple flat wire structures are wound on the stator core. Each flat wire structure has two connecting ends. At least one of the connecting ends has an end face that exposes the core wire of the flat wire structure to the insulation layer, and at least one exposed side face. The at least one exposed side face includes a mating surface, which is inclined.

[0007] In the stator core, two adjacent flat wire structures are welded together, the two welded ends are arranged crosswise, and the two mating surfaces are in contact.

[0008] In one embodiment, the mating surface is inclined to the centerline of the connecting end.

[0009] In one embodiment, the mating surface is inclined in a direction away from the end face toward the centerline of the connection end.

[0010] In one embodiment, the mating surface and the end face are set at an obtuse angle.

[0011] In one embodiment, the connection end further includes a covered side that is covered by the insulating layer.

[0012] In one embodiment, the connecting end includes two adjacent exposed sides, one of which is the mating surface and the other is the welding surface. In the two connecting ends that are welded together, the two mating surfaces are in contact with each other, the two welding surfaces are adjacent to each other, and a weld is formed at the junction of the two welding surfaces.

[0013] In one embodiment, the welding surface is inclined in a direction away from the end face toward the centerline of the connection end.

[0014] In one embodiment, the connecting end further includes a clearance surface adjacent to the mating surface and opposite to the welding surface in the circumferential direction of the connecting end, the clearance surface being inclined in a direction gradually away from the centerline of the connecting end in a direction away from the end face.

[0015] In one embodiment, the welding surface, the mating surface, and the clearance surface are all configured as cutting surfaces.

[0016] In one embodiment, the connecting end is tapered in the direction of its end face near the connecting end.

[0017] In one embodiment, the stator core is arranged in a ring shape, and the inner sidewall of the stator core is provided with a plurality of grooves that are spaced apart along the circumference of the stator core, and each groove is provided to pass through both ends along the axial direction of the stator core.

[0018] The flat wire structure includes a winding body, the middle of which is bent to form two winding segments. Each winding segment includes a first extension segment and a second extension segment arranged at an angle. The two first extension segments of the two winding segments are connected and are respectively located in two of the grooves. The two second extension segments extend in a direction away from each other.

[0019] The portion of the core wire corresponding to the ends of the two second extension segments forms the connection end.

[0020] This utility model also proposes an electric motor, including the stator described above.

[0021] This utility model also proposes a vehicle that includes the aforementioned motor.

[0022] In the technical solution of this utility model, the two connecting ends that are welded to each other are arranged in a cross configuration, so that multiple flat wire structures form an xpin winding. When connecting and cooperating the flat wire windings, the joint surface of a single flat wire structure is located on the side of the core wire, and its size can be set larger than that of the end face of the core wire. Since the joint surface is inclined, when the two flat wire structures are welded, the two joint surfaces have a larger contact area than the existing planar bonding structure, thereby enhancing the welding connection force and improving the conductivity after welding. This improves the problem of poor connection quality after welding in existing winding welding. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0024] Figure 1 A schematic diagram of the first embodiment of the flat wire structure provided by this utility model (testing a single steel strip);

[0025] Figure 2 for Figure 1 A schematic diagram of two flat line structures mating (two mating surfaces facing each other);

[0026] Figure 3 for Figure 1 A schematic diagram of the fit between two flat wire structures (two mating surfaces);

[0027] Figure 4 for Figure 1 Schematic diagram of the middle connection end;

[0028] Figure 5 for Figure 1 A schematic diagram of the fit between the mid-end face and the mating surface;

[0029] Figure 6 for Figure 1 A schematic diagram of another assembly state of the medium-flat wire structure;

[0030] Figure 7 for Figure 1 Schematic diagram of the middle stator core;

[0031] Figure 8 for Figure 1 A schematic diagram of the mating of the flat wire winding and the fixture.

[0032] Explanation of icon numbers:

[0033] 1000, Stator; 100, Flat wire structure; a, Core wire; b, Insulation layer; 1, Connecting end; 11, End face; 12, Joint surface; 13, Welding surface; 14, Avoidance surface; 15, Weld; 1a, Exposed side; 1b, Covered side; 2, Winding section; 21, First extension section; 22, Second extension section; 200, Stator core; 210, Groove; 300, Fixture.

[0034] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0035] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0036] It should be noted that if the embodiments of this utility model involve directional indication, the directional indication is only used to explain the relative positional relationship and movement of each component in a specific posture. If the specific posture changes, the directional indication will also change accordingly.

[0037] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of indicated technical features. Therefore, features defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. If the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0038] With technological advancements, the requirements for power density, torque density, and cost of new energy motors are increasing. The latest Xpin motor solution improves power and torque density compared to existing mass-produced Hair-pin solutions, while also increasing raw material costs. However, it still suffers from numerous issues such as unstable connections after winding and welding, and short creepage distances.

[0039] In view of this, the present invention provides a stator designed to increase the contact area during welding of flat wire structures, thereby enhancing the connection effect and conductivity.

[0040] Please refer to Figures 1 to 4The stator 1000 includes a stator core 200 and a plurality of flat wire structures 100. The plurality of flat wire structures 100 are wound on the stator core 200 and are presented in the form of flat wire windings on the stator core 100. The flat wire structure 100 consists of a core wire a and an insulating layer b covering the core wire a. The flat wire structure 100 has two connecting ends 1. At least one connecting end 1 has an end face 11 of the core wire a exposed from the insulating layer b and at least one exposed side face 1a of the core wire a exposed from the insulating layer b. The at least one exposed side face 1a includes a mating surface 12, which is inclined. In the circumferential direction of two adjacent flat wire structures 100, the two connecting ends 1 are welded together. The two welded connecting ends 1 are arranged crosswise, and the two mating surfaces 12 are in contact.

[0041] In the technical solution of this utility model, when connecting and cooperating flat wire windings, the joint surface 12 of a single flat wire structure is set on the side of the core wire a. The size of the joint surface 12 can be set larger than that of the end face 11 of the core wire a. Since the joint surface 12 is inclined, when the two flat wire structures 100 are welded, the two joint surfaces 12 have a larger contact area than the existing planar bonding structure, thereby enhancing the welding connection force and improving the conductivity after welding. This improves the problem of poor connection quality after welding in existing wire winding welding.

[0042] Core wire a serves as a conductor for current transmission; insulation layer b is attached to the surface of the conductor, serving to isolate current flow between adjacent conductors. In some embodiments, the flat wire structure 100 is an enameled wire, insulation layer b is a enamel coating, and core wire a is a copper wire.

[0043] When two flat wire structures 100 are welded together, the two adjacent connecting ends 1 of the two flat wire structures 100 are welded together, so that the current conduction of the two flat wire structures 100 is realized after the welding is completed.

[0044] Specifically, multiple flat wire structures 100 are connected according to certain requirements and twisted at a certain angle to form a flat wire winding. The flat wire winding passes through the interior and both ends of the stator core 200, so that after winding, it can partially protrude from the stator core 200 on both sides of its axial direction. The part of the flat wire winding protruding from the stator core 200 forms a crown end and a welded end. The core wire a at the crown end is covered by an insulating layer b. After multiple connecting ends 1 are welded together, they form corresponding welded ends. At the welded ends, the mating surfaces 12 of two adjacent flat wire structures 100 are attached and laser welded, so that the multiple flat wire structures 100 form a current conduction.

[0045] It should be noted that when welding the winding structure 100, one end of each winding structure can be welded by the above-mentioned inclined joint surface, and the other end can also adopt the same joint structure, or other butt joint forms can be adopted. This utility model does not limit this.

[0046] During welding, the two connecting ends 1 are joined together via the laterally positioned mating surfaces 12. At this point, it is necessary to consider not only the welding continuity of the core wire a, but also the overall height of the two flat wire structures 100 after welding. Therefore, the corresponding welding gap can be formed between the end face 11 of one connecting end 1 and the exposed side surface 1a of the other connecting end 1, or between the exposed side surfaces 1a of both connecting ends 1. Thus, the end face 11 or the side surface of the connecting end 1 forms the welding surface 13.

[0047] Specifically, this utility model does not limit the inclination range and inclination reference plane of the mating surface 12. In some embodiments, the mating surface 12 is inclined to the center line of the connecting end 1. That is, the side where the mating surface 12 is located is at an angle to the center line of the connecting end 1. Depending on the working conditions, the orientation of the mating surface 12 is different when the two flat wire structures 100 are mated, so the inclination direction of the mating surface 12 can be reasonably set.

[0048] In other embodiments, the mating surface 12 may be inclined relative to the welding surface 13. In this case, the mating surface 12 itself may also be parallel to the center line of the connecting end 1, causing the plane in which it is located to be deflected. That is, the two ends of the mating surface 12 in the circumferential direction of the connecting end 1 are spatially offset, thus presenting an inclined setting.

[0049] Taking the front-back and left-right directions as examples, the matching of the center line of the mating surface 12 and the connecting end 1 in different embodiments is explained. For example, the center line of the connecting end 1 extends in the front-back direction, and the mating surface 12 extends in the front-back direction as a whole and extends in the left-right direction. In one embodiment, the mating surface 12 is inclined in the front-back direction, that is, its extension direction is set at an angle with the center line of the connecting end 1; in another embodiment, the mating surface 12 is inclined in the left-right direction. At this time, the mating surface 12 is parallel to the center line of the connecting end 1 as a whole, but it is inclined in the extension direction.

[0050] In this embodiment, please refer to Figure 5 The mating surface 12 is inclined away from the end face 11 in a direction gradually moving away from the center line of the connecting end 1. That is, one side of the mating surface 12 is adjacent to the end face 11, and the other side is inclined away from the center line of the connecting end 1. The state of the two flat wire structures 100 being fitted is further adjusted by limiting the extension direction of the mating surface 12.

[0051] Specifically, the mating surface 12 and the end face 11 are set at an obtuse angle. Figure 5 The included angle α, as indicated, is greater than 90°. The specific value can be adjusted according to the actual design scheme.

[0052] It should be noted that the inclination of the two mating surfaces 12 can be the same or different, that is, the included angle α of the mating surfaces 12 on the two connecting ends 1 in each flat wire structure 100 can be different. This is because the gap between the mating surfaces 12 needs to be as small as possible during welding, so it is necessary to ensure that the two mating surfaces 12 are parallel. However, during the mating process, deviations may occur due to the influence of orientation, torsion angle and processing. Therefore, the size of the included angle α can be used to adapt to the corresponding welding conditions.

[0053] Furthermore, the connecting end 1 also includes a covered side 1b covered by the insulating layer b. That is, during processing, it is not necessary to pre-peel the insulating layer b at the end of the flat wire structure 100; the core wire a can be cut directly. This reduces processing steps. A portion of the insulating layer b and part of the core wire a are removed, resulting in the exposed side 1a. It should be understood that on the end face 11 of the flat wire structure 100, the core wire a is already exposed above the insulating layer b. This structural form eliminates the need for varnish removal during processing, retaining more of the insulating layer b at the corresponding location of the connecting end 1 of the flat wire structure 100, providing greater protection for the core wire a, and thus increasing the creepage distance between the core wires a.

[0054] Please refer to Figures 2 to 3 The connecting end 1 includes two adjacent exposed side surfaces 1a, one of which is a mating surface 12 and the other is a welding surface 13. When the flat wire structure 100 is welded to another flat wire structure 100, the mating surface 12 is used to fit against the mating surface 12 of the core wire a of the other flat wire structure 100, and the welding surface 13 is used to abut against the welding surface 13 of the core wire a of the other flat wire structure 100, and a weld 15 is formed at the intersection of the two welding surfaces 13. In the embodiment of this utility model, the welding surface 13 and the mating surface 12 are adjacent to each other on the periphery of the connecting end 1. This arrangement makes the two connecting ends 1 of the two flat wire structures 100 more horizontal during welding, which can further reduce the welding height.

[0055] Based on the above embodiments, the welding surface 13 can be arranged parallel to the center line of the connecting end 1, that is, a portion of the material is removed from the surface of the connecting end 1 of the core wire a to obtain a plane parallel to the center line of the connecting end 1, and this plane is used as the welding surface 13.

[0056] Please refer to Figure 4The welding surface 13 is inclined to the centerline of the connecting end 1. That is, an inclined surface is obtained by oblique cutting on one side of the connecting end 1 of the core wire a, and this inclined surface serves as the welding surface 13. Specifically, the welding surface 13 is inclined in a direction gradually away from the centerline of the connecting end 1 in the direction away from the end face 11.

[0057] It should be noted that when the flat wire structure 100 is welded to another flat wire structure 100, the two corresponding welding surfaces 13 are adjacent. However, due to factors such as the fitting angle and machining accuracy, the two welding surfaces 13 may be on the same plane, may be set at an angle, or may be parallel to each other.

[0058] For further details, please refer to [link / reference] again. Figure 4 The connecting end 1 also includes a clearance surface 14 adjacent to the mating surface 12 and opposite to the welding surface 13 in the circumferential direction of the connecting end 1. The clearance surface 14 is inclined to the centerline of the connecting end 1. Specifically, the clearance surface 14 is inclined in a direction gradually away from the centerline of the connecting end 1 in the direction away from the end surface 11. The clearance surface 14 mainly serves a clearance function, specifically, when the flat wire structure 100 is welded to another flat wire structure 100, it avoids the insulation layer b of the other flat wire structure 100. At the same time, the clearance surface 14 can also prevent the insulation layer b of the flat wire structure 100 from interfering with another winding, thereby ensuring that the two mating surfaces 12 fit together.

[0059] It should be understood that the clearance surface 14 and the welding surface 13 are located on opposite sides, and the clearance surface 14 and the welding surface 13 should be inclined in a direction away from each other to avoid the local thickness reduction of the core wire a affecting the connection strength. The inclination of the clearance surface 14 and the welding surface 13 can be the same or different, and can be reasonably designed according to actual needs.

[0060] Meanwhile, the arrangement of the clearance surface 14 and the welding surface 13 reduces the area of ​​the end face 11 of the connecting end 1, thereby facilitating the insertion of the flat wire structure 100 into the stator core 200.

[0061] To facilitate the application and installation of the flat wire structure 100, the connecting end 1 is tapered in the direction of its end face near the connecting end, that is, the cross-sectional area of ​​the two connecting ends 1 is tapered in the direction away from each other. With this arrangement, when the flat wire structure 100 is applied and installed, the connecting end 1 can also serve as an installation guide end, making it easier to pass through the corresponding slot.

[0062] It should be noted that, in addition to the inclined design of the welding surface 13, the avoidance surface 14, and the mating surface 12, the remaining exposed side 1a of the connecting end 1 can also be inclined, so that the connecting end 1 as a whole is truncated pyramidal in shape, which is convenient for installation.

[0063] Furthermore, the clearance surface 14, welding surface 13, and mating surface 12 are all set as cutting surfaces, meaning that the corresponding clearance surface 14, welding surface 13, and mating surface 12 can all be obtained by cutting.

[0064] This utility model does not limit the specific form of the flat wire structure 100. In specific application scenarios, the flat wire structure 100 can be bent to adapt to the installation environment. In some embodiments, please refer to Figure 6 The flat wire structure 100 includes a winding body, the middle of which is bent to form two winding segments 2. Each winding segment 2 includes a first extension segment 21 and a second extension segment 22 arranged at an angle. The two first extension segments 21 of the two winding segments 2 are connected, and the two second extension segments 22 extend in a direction away from each other. The portion of the core wire a corresponding to the end of the two second extension segments 22 forms a connecting end 1. The two first extension segments 21 can be connected in a V-shape or a U-shape, which can be reasonably designed according to the specific application scenario. The two second extension segments 22 extend in a direction away from each other. When the flat wire structure 100 is welded to another flat wire structure 100, the ends of the second extension segments 22 and the second extension segments 22 of the other flat wire structure 100 overlap in the horizontal direction, thereby achieving the contact of the mating surfaces 12 of the two connecting ends 1.

[0065] According to the requirements of magnetic field coordination, the portion of the flat wire structure 100 located at the welding end needs to be twisted at a certain angle to achieve the corresponding function. This results in the flat wire structure 100 exhibiting an external shape with the first extension segment 21 and the second extension segment 22 arranged at an angle.

[0066] For further details, please refer to Figure 7 The stator core 200 is arranged in a ring shape. Multiple grooves 210 are spaced apart along the circumference of the stator core 200 on its inner sidewall. Each groove 210 extends through both ends along the axial direction of the stator core 200, and multiple flat wire structures 100 are wound within each groove 210. Specifically, the two first extensions 21 of the two winding segments 2 are respectively located in two of the grooves 210. The grooves 210 serve as winding grooves, providing positioning and guidance for the installation of the flat wire structures 100. The winding installation is achieved by inserting the connecting end 1 of the flat wire structure 100 through the groove 210 along the axial direction of the stator core 200.

[0067] To prevent the flat wire structure 100 near the opening of the groove 210 from coming off, a limiting protrusion is provided at the opening of the groove 210 so that the opening size of the groove 210 is smaller than the wire diameter of the flat wire structure 100, thereby achieving the effect of limiting and preventing detachment.

[0068] In the embodiments of this utility model, please refer to Figure 1 , Figure 2 ,and Figure 8The structure and manufacturing process of stator 1000 are as follows:

[0069] The stator 1000 includes a stator core 200 and a flat wire winding. The stator core 200 includes a certain number of grooves 210, which can be 48, 54, or 72. The flat wire winding consists of multiple flat wire structures 100 assembled in the multiple grooves 210. The flat wire winding is exposed at both ends of the stator core 200 along the axial direction, which are the welding end and the crown end, respectively. The welding end contains several flat wire structures 100 distributed circumferentially along the stator core 200. The several flat wire structures 100 are welded together by a connecting end 1, which has an end face 11, a welding surface 13, a mating surface 12, and a clearance surface 14. The end face 11 is obtained by cutting the raw material coil. The welding surface 13 and the clearance surface 14 are obtained by cutting along a set path starting from the end face 11. After processing the welding surface 13 and the clearance surface 14, the mating surface 12 is obtained by cutting along the set path starting from the end face 11, and the mating surface 12 is set at an obtuse angle to the end face 11. The obtuse angle α of adjacent connecting ends 1 can be inconsistent and adjusted according to the actual design scheme. Since this structure directly processes the enameled wire during processing, initially, the end face 11 includes the exposed core wire a and the insulation layer b covering the circumference of the core wire a. The other positions of the connecting end 1 are composed of the covered side surface 1b. After cutting, the insulation layer b on three sides of the connecting end 1 and part of the core wire a are removed, thereby obtaining the exposed side surface 1a. At this time, the end face 11 still contains the cross-section of part of the insulation layer b. That is, the welding surface 13, the clearance surface 14, and the mating surface 12 are all obtained by cutting.

[0070] During welding of adjacent flat wire structures 100, the mating surfaces 12 of the two adjacent connecting ends 1 are first brought together to face each other and tend to be parallel. At this time, the distance between the two mating surfaces 12 is no more than 1 mm. Then, the two connecting ends 1 are pressed by the fixture 300, so that the two mating surfaces are in contact, thereby ensuring that the two welding surfaces 13 are close together to form a weld 15. At this time, the mating surfaces 12 extend vertically, and the welding surfaces 13 extend horizontally. The weld 15 is connected by laser welding. The fixture 300 is arranged in a ring shape, so that several flat wire structures 100 on the circumference can be pressed together, thereby allowing several weld seams on the circumference to be welded simultaneously.

[0071] This utility model also proposes an electric motor, which includes a stator 1000. The specific structure of the stator 1000 is as described in the above embodiments. Since this electric motor adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be described in detail here.

[0072] It should be noted that this motor can be used in home appliances, industrial equipment, vehicles, etc.

[0073] This utility model also proposes a vehicle, which includes a motor. The specific structure of the motor is as described in the above embodiments. Since this vehicle adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be described in detail here.

[0074] The above are merely preferred embodiments of this utility model and do not limit the patent scope of this utility model. Any equivalent structural transformations made based on the inventive concept of this utility model and the contents of this utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of this utility model.

Claims

1. A stator, characterized in that, include: Stator core; as well as, Multiple flat wire structures are wound on the stator core. Each flat wire structure has two connecting ends. At least one of the connecting ends has an end face that exposes the core wire of the flat wire structure to the insulation layer, and at least one exposed side face. The at least one exposed side face includes a mating surface, which is inclined. In the stator core, two adjacent flat wire structures are welded together, the two welded ends are arranged crosswise, and the two mating surfaces are in contact.

2. The stator as described in claim 1, characterized in that, The mating surface is inclined to the center line of the connecting end.

3. The stator as described in claim 2, characterized in that, The mating surface is inclined in a direction away from the end face, gradually moving away from the center line of the connecting end.

4. The stator as described in claim 3, characterized in that, The mating surface and the end face are set at an obtuse angle.

5. The stator as described in claim 1, characterized in that, The connection end also includes a covered side that is covered by the insulating layer.

6. The stator as described in claim 1, characterized in that, The connecting end includes two adjacent exposed sides, one of which is the mating surface and the other is the welding surface. In the two connecting ends that are welded together, the two mating surfaces are in contact with each other, the two welding surfaces are adjacent to each other, and a weld is formed at the junction of the two welding surfaces.

7. The stator as described in claim 6, characterized in that, The welding surface is inclined in a direction away from the end face, gradually moving away from the center line of the connection end.

8. The stator as described in claim 6, characterized in that, The connecting end also includes a clearance surface (14) adjacent to the mating surface and opposite to the welding surface in the circumferential direction of the connecting end. The clearance surface (14) is inclined in a direction away from the end face towards the center line of the connecting end.

9. The stator as described in claim 8, characterized in that, The welding surface, the mating surface, and the clearance surface are all designed as cutting surfaces.

10. The stator as claimed in claim 1, characterized in that, The connection end is tapered in the direction of the end face near the connection end.

11. The stator as claimed in claim 1, characterized in that, The stator core is arranged in a ring shape, and the inner sidewall of the stator core is provided with a plurality of grooves that are spaced apart along the circumference of the stator core. Each groove is arranged to pass through both ends along the axial direction of the stator core. The flat wire structure includes a winding body, the middle of which is bent to form two winding segments. Each winding segment includes a first extension segment and a second extension segment arranged at an angle. The two first extension segments of the two winding segments are connected and are respectively located in two of the grooves. The two second extension segments extend in a direction away from each other. The portion of the core wire corresponding to the ends of the two second extension segments forms the connection end.

12. An electric motor, characterized in that, Includes the stator as described in any one of claims 1 to 11.

13. A vehicle, characterized in that, Including the motor as described in claim 12.

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